@Inproceedings{EPTCS55.2,
  author    = {Perrone, Gian and Debois, S{\o}ren and Hildebrandt, Thomas},
  year      = {2011},
  title     = {Bigraphical Refinement},
  editor    = {Derrick, John and Boiten, Eerke and Reeves, Steve},
  booktitle = {{\rm Proceedings 15th International}
               Refinement Workshop,
               {\rm Limerick, Ireland, 20th  June 2011}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {55},
  publisher = {Open Publishing Association},
  pages     = {20-36},
  doi       = {10.4204/EPTCS.55.2},
}